If y is the dependent variable and is the independent variable. And if the sum ofthe cross product of the deviations is Σ(x - x)(y-7)= -53, and alsoif 3.49 and 2.55 are the standard deviations for the independent and dependentvariables, respectively, and we have a sample size of 20, what is the correlationcoefficient between X and y?Note:1- Do not round intermediate numbers.2- Round your final answer to 2 decimal places.Your Answer:-0.31

According to the given information,Sample size, n = 20

Answered: If y is the dependent variable and is…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Let x be the average number of employees in a group health insurance plan, and let y be the average administrative cost as a percentage of claims. Suppose a random sample of employees gave the following information. X 12 8 14 32 73 y 50 45 35 28 16 Would you say the correlation is low, moderate, or strong? Positive or negative? If necessary, draw a scatter diagram of the given data. O strong and negative O moderate and positive strong and positive O low and negative
You wish to determine if there is a positive linear correlation between the age of a driver and the number of driver deaths. The following table represents the age of a driver and the number of driver deaths per 100,000. Use a significance level of 0.05 and round all values to 4 decimal places. Driver Age Number of Driver Deaths per 100,000 21 19 27 20 58 31 77 31 47 24 50 26 Ho: ρ = 0Ha: ρ > 0 Find the Linear Correlation Coefficient r = Find the p-value p-value = The p-value is Greater than αα Less than (or equal to) αα The p-value leads to a decision to Reject Ho Accept Ho Do Not Reject Ho
If y is the dependent variable and is the independent variable. And if the sum of the cross product of the deviations is (x − x)(y – y)= -54, and also if 10.20 and 5.91 are the variances for the independent and dependent variables, respectively, and we have a sample size of 16, what is the correlation coefficient between X and y? Note: 1- Round your intermediate numbers to 4 decimal places. 2- Round your final answer to 2 decimal places. Your Answer:
ps-5
A group of university researchers wanted to determine the relationship that exists between the number of hours spent by a student in social media in a day (X) and their grade weighted average (Y). Twelve randomly selected students produced the following findings: Number of GWA Hours 4.0 95 8.0 85 87 89 91 85 89 86 84 96 82 85 7.0 6.5 5.5 9.0 4.0 10.0 7.5 2.0 12.0 9.0
Suppose a car's city miles per gallon rating can be determined by the car's weight. The means and standard deviations of these variables and the correlation coefficient between them are reported in the following table: What proportion of the variability in cars' miles per gallon ratings is explained by the least squares line with weight?
Suppose the variance of X is 14. What is the variance of .47X?
2. Which of the following values cannot be a correlation coefficient? Group of answer choices -.274 1.473 -.650 .615
2.) The table shown below are the raw scores obtained by eight (8) students. Is there a relationship in their scores in Mathematics and in Biology? Use Pearson Product-Moment Coefficient of Correlation to establish the relationship. Student 1 3 4 6. 8. Mathematics (x) 6. 3. 4 3 Biology (y) 8. 3. 7 4
16. In comparing the relationship between rainfall and hot dog sales, a student finds the correlation to be r = -0.56. What is the best description of the relationship between these two sets of data? Group of answer choices Negative and Strong Positive and Weak Negative and Moderate Positive and Moderate
8. The table below summarizes x and y values. Find the sample correlation coefficient, rxy using the formula below or by using calculator regression (do not use Excel). Is there a good linear relationship between x and y? (*see attached image for the table.

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